Rhino-Rack RJKB1 Backbone 3 Base for Jeep Wrangler JK 4 Door

The Rhino-Rack RJKB1 Backbone 3 Base Mounting System is an interior structural support with exterior plates for use with a Jeep JK Wrangler 4 Door. Three exterior plates are permanently mounted to each side of the exterior of the JK's hard top and connected to an interior frame in order to give you a huge 120kg/264lb dynamic carrying capacity. By using a Rhino-Rack Backbone instead of a typical raingutter rack, you can get a much wider spread from crossbar to crossbar, with the option for a third bar or the use of a Rhino-Rack Pioneer Platform.

Have a two door Jeep Wrangler JK? Select the RJKB2 Backbone 2 Base Mounting System instead.

Features

• Increases the dynamic rooftop carrying capabilities of your Jeep JK Wrangler to 120kg/264lb
  
• Includes all the internal support frames
  
• Includes mounting plates so you can attach a 2 or 3 bar roof rack system or the Pioneer Platform
  
• Includes fitting hardware required for the install
  
• Five year warranty from Rhino-Rack
  
• Matches with the Rhino-Rack Pioneer Platform 42107B (sold separately)
  
• Add a Rhino-Rack RJKPF Backbone Protective Foam (sold separately) for internal comfort and safety
  
• Installation instructions: PDF download (external link)
  
• Installation supplement: PDF download (external link)